Abstract:
Correlation functions of exactly solvable models can be described by differential equations [1]. In this paper we show that for the non-free fermionic case, differential equations should be replaced by integro-differential equations. We derive an integro-differential equation, which describes a time and temperature dependent correlation function of the penetrable Bose gas. The integro-differential equation turns out to be the continuum generalization of the classical nonlinear Schrödinger equation.
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Received: 15 January 1997 / Accepted: 21 March 1997
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Kojima, T., Korepin, V. & Slavnov, N. Completely Integrable Equation for the Quantum Correlation Function of Nonlinear Schrödinger Equation . Comm Math Phys 189, 709–728 (1997). https://doi.org/10.1007/s002200050226
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DOI: https://doi.org/10.1007/s002200050226